Hydraulic air-pump



No Model.) 2 Sheets-Sheet 1.

A. G. NO AGK.

I HYDRAULIC AIR PUMP. No. 575,614. Patented Jan. 19, 1897.

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(No Model.) 2 SheetS- -Sheet 2. A. G.-NOAOK. HYDRAULIC AIR PUMP.

o. 575,614. Patented Janjl 1897.

'qfi IN VEIV TOR A TTOIINEY UNITED STATES PATENT OFFICE.

ADOLPH G. NOACK, OF BROOKLYN, NEXV YORK, ASSIGNOR TO THE v BERNER-MAYERCOMPANY, OF OHIO.

HYDRAULIC AIR-PUMP.

SPECIFICATION forming part of Letters Patent No. 575,614, dated January19, 1897.

Application filed October 30, 1895. Serial No. 567,439. (No model.)

To mull/710m it may concern:

Be it known that I, ADOLPH G. N OACK, a citizen of the United States,and a resident of the city of Brooklyn, in the county of Kings and Stateof New York, have invented certain new and useful Improvements inHydraulic Air-Pumps, of which the following is such a full, clear,concise, and exact description as will enable others skilled in the artto which my invention ,appertains to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

My invention relates to that class of airpumps in which water-pressureis utilized for operating the piston. In such pumps it is usuallynecessaryto have a nice adjustment and regulation of the parts. Theinlet-valve must be so constructed and arranged as to admit the water atthe proper time to give the piston its forward or compression stroke, atthe end of which this valve must be closed, the water-outlet valveopened, and the water discharged from the cylinder during the return orback stroke.

The objects of my invention are to construct a hydraulic air-pump insuch a manner as to simplify the valve mechanism and water connectionsand to insure efficiency; and it consists in the construction andarrangement of parts, all as hereinafter described, and pointed out inthe claims.

In the accompanying drawings, Figure 1 is a vertical central section ofmy improved airpump, showing the sliding piston or traveler in itslowest position within the cylinder and with the water-inlet valve opento admit the water for actuating the piston. Fig. 2 is a similarsection, but showing the piston in its highest position or at the end ofits compression-stroke and showing also the air-relief valve open, thewater-inlet valve closed, and the water-outlet valve open or lifted fromits seat for permitting the water to flow out during the return of thepiston to its former or normal position. Fig. 3 is a horizontal sectiontaken on the line 3 3 of Fig. 1, giving a plan view of the seat for thewater-outlet valve and of the surrounding port through which the waterflows to the discharge-outlet, and in this figure the stem of thewater-inlet valve is shown in section. Fig. 4 is a horizontal sectiontaken on the line 4. at of Fig. 1, showing the water-outlet port at alower point than in Fig. 3, the discharge-outlet appearing in section,as does also the stem of the water-inlet valve. Fig. 5 is a detachedperspective view of the air-relief valve, which is operated by thepiston near the end of its compression-strokewhen it becomes necessaryto open the water-outlet valve. Fig. 6 is a detached perspective view ofthe water outlet valve, showing its form and the yoke by which it isconnected to the stem of the water-inlet valve and to a rod by whichboth valves are lifted, so that the inlet-valve is brought to its seatand the outlet-valve away from its seat. Fig. 7 is a separate or detached view of the piston or traveler, which is moved within thecylinder and shows in connection therewith the water inlet and thewater-outlet valves.

In the drawings, A represents the pumpcylinder, which may be of glass,metal, or any other suitable substance. This cylinder is covered at thetop by a head B, which for convenience of manufacture is preferablyformed in sections or parts a b 0, one above the other, with a dome B atthe top, as shown. The section a is secured over the top of the cylinderA and is provided with a chamber a, which communicates with the interiorof the cylinder. The chamber a contains an air-relief valve a the formof which is best shown by Fig. 5, and this relief-valve rests upon aseat a so as to cover a port a, which when open makes communicationbetween the chamber a and the atmosphere.

A gasket or packing-ring b is preferably interposed at the juncture ofthe sections a and b, in order to insure an air-tight joint. The sectionb is provided with an air-inlet port 19 closed at its inner end by alight valve b preferably of rubber, and this valve when drawn orlifted-from its seat permits free ingress of the air, which passesthrough a communication b to the chamber a and from thence to theinterior of the cylinder. A gasa slitted rubber discharge-valve 0 whichis secured over the collar 0. The flanged base of the dome B rests onthe diaphragm c and is secured along with it and the air-discharge valveby the section 0, screwed to the top part of the section Z), as shown.The dome B is provided with an outlet to be connected with a tube orpipe leading to a reservoir (not shown) for receiving the air whencompressed.

A weight 0, preferably molded of lead, which also acts as the piston ortraveler, is placed within the cylinder A and has its lower end securedto a base or bottom piece D by a screw-threaded projecting tube or pipe(1, around which the lead is molded and thus secured thereto. A packingd. is interposed between the weight 0 and its. base D, in order to closethe clearance and make a watertight joint between the piston and thecylinder. The tube (1 also extends upwardly within the weight nearly tothe top and contains a rod (1 with a head or flange d at its top. Thisrod is surrounded by a spring d, which seats on the base or bottom piece1), as shown in Figs. 1 and 2, and operates when the relief-valve a isopen to lift the rod (1 connected with the water inlet and outletvalves, so as to open the former and close the latter, as hereinafterexplained.

The rod (Z passes through the base of the piston and may be providedwith a nut or flange (Z 110 receive the screw-threaded end of a stem 6for the water-inlet valve 6 after such stem has been secured, as byscrewing to the yoke e of the water-outlet valve 6 which seats over anoutlet-port e, made in the basecasting E of the cylinder A. Thisbase-casting, as shown, is secured to the cylinder bya screw-threadedcollar f, and it is provided with a water-inlet port f", communicatingwith some source from which the water can be supplied under pressure.

A chamber F is formed in the base-casting beneath the bottom piece ofthe piston, and the inlet portf communicates with this chamher by apassage around the stem of the water inlet valve. The discharge-valve 6being located within this chamber over the port 6 prevents the waterfrom passing out of it until lifted from its seat, when the water willbe free to emerge through an outlet pipe or passage f from which it isdischarged or led away. The valve c, with its stem e, is insertedthrough an opening in the bottom of the casting E, and when secured theopening is closed bya nutf as shown in Figs. 1 and 2.

Viewing the compressor with its parts in the position shown in Fig. 1,it will be observed that the piston or traveler O is in its lowestposition within the cylinder A, and that assuming the connections to bemade for operating the compressor the cylinder above the piston will befilled with air, the air-inlet valve 1) and the air-outlet or dischargevalve 0 will both be closed, while the relief-valve a will be resting onits seat, as shown. In such case the water-inlet valve c will be openand. the water-discharge 0r outlet valve c will be resting on its seatover the watenoutlet port e, as shown.

The operation of the pump begins by the inflow of water through theportf" in the direction indicated by the arrows. The water rises in thechamber F until it reaches the bottom D of the piston 0, when it willraise the piston and force it up within the cylinder, coinpressing theair in the space above it. As the air begins to compress it will actagainst the air-inlet valve 19 forcing it tightly to its seat, andfinding no escape will pass within the air-discharge valve 0 and openthe slit, through which it can pass into the dome B and to-thereservoir. \Vhile the piston is moving upward the air also acts againstthe top surface of the relief-valve a so as to force it more tightlyagainst its seat.

During the upward movement of the piston the rod 61 remains stationaryuntil the spring (2 contracts by reason of its meeting the upper head orflange of the rod (Z and the tendency will be to lift the water-outletvalve 6 but as the lower portion of the cylinder is at this time filledwith water under pressure the spring d will contract to its limitwithout either closing the inlet-valve e or opening the outlet-valve eWhen this point is reached, the weight G strikes the projections of theair-relief valve a which lifts it from its seat, and the escape of airfrom the chamber a permits the piston to move rapidly up to the top ofthe cylinder, while at the same time the spring 61 expands and lifts therod 61 so as to close the waterinlet valve e and open the water-outletvalve e Vt hen the air-relief valve a is opened to permit the air toescape from the chamber a, the back pressure 01' the air in the dome Bwill act to close the slit in the air-discharge valve 0 and preventreturn of the air already compressed.

The water-outlet valve 6 being open and the water-outlet valve 0 beingclosed, the act of compression ceases and the water recedes from thecylinder and passes off through outlet f The piston 0 moves down withinthe cylinder A, creating a suction which acts to lift the air-inletvalve 1) and open the airinlet port 11 by which means the air-spacewithin the cylinder is filled. The pressure of the water upon thewater-inlet valve e keeps it closed and holdsthe stein e, together withthe rod (Z up until the base D of the weight C reaches the flange d onsuch rod, which is thereby depressed and carries the water-outlet valve6 to its seat, at the same time opening the water-inlet valve 6', whenthe piston will again be moved up and compress the air, as before, andthe operation can be repeated over and over until the water-pressure isshut oii'.

It is obvious that variations in the way of modifications not shown andin details not specifically pointed out may be made without departingfrom either the spirit or substance of my invention, and I do nottherefore confine myself to the exact forms and arrangements shown anddescribed.

Havingthus described my invention, what I claim as new, and for which Idesire hereby to secure Letters Patent, is-

1. In a hydraulic air-compressor, the combination of a chamber havingair inlet and outlet valve mechanism, a traveler actuated by the WaterWithin such chamber, a waterinlet channel, a Water-outlet channel, avalvestem connected to said traveler and passing through saidwater-inlet channel, a Waterinlet valve and a water-outlet valverespectively connected to difierent points of such valve-stem,substantially as set forth.

